diff options
Diffstat (limited to 'c++/src/H5Location.h')
| -rw-r--r-- | c++/src/H5Location.h | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/c++/src/H5Location.h b/c++/src/H5Location.h new file mode 100644 index 0000000..d1dd892 --- /dev/null +++ b/c++/src/H5Location.h @@ -0,0 +1,146 @@ +// C++ informative line for the emacs editor: -*- C++ -*- +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * Copyright by The HDF Group. * + * Copyright by the Board of Trustees of the University of Illinois. * + * All rights reserved. * + * * + * This file is part of HDF5. The full HDF5 copyright notice, including * + * terms governing use, modification, and redistribution, is contained in * + * the files COPYING and Copyright.html. COPYING can be found at the root * + * of the source code distribution tree; Copyright.html can be found at the * + * root level of an installed copy of the electronic HDF5 document set and * + * is linked from the top-level documents page. It can also be found at * + * http://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have * + * access to either file, you may request a copy from help@hdfgroup.org. * + * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + +#ifndef _H5Location_H +#define _H5Location_H + +#include "H5Classes.h" // constains forward class declarations + +// H5Location is an abstract class. It provides a collection of wrappers +// of C functions which take location IDs. Most of these were in H5Object +// but are now moved here for H5File's access. + +#ifndef H5_NO_NAMESPACE +namespace H5 { +#endif + +class H5_DLLCPP H5Location; // forward declaration for UserData4Aiterate + +// Define the operator function pointer for H5Aiterate(). +typedef void (*attr_operator_t)( H5Location& loc/*in*/, + const H5std_string attr_name/*in*/, + void *operator_data/*in,out*/); + +class UserData4Aiterate { // user data for attribute iteration + public: + attr_operator_t op; + void* opData; + H5Location* location; +}; + +// An H5Location can be a file, group, dataset, named datatype, or attribute. + +class H5_DLLCPP H5Location : public IdComponent { + public: + // Creates an attribute for the specified object at this location + // PropList is currently not used, so always be default. + Attribute createAttribute( const char* name, const DataType& type, const DataSpace& space, const PropList& create_plist = PropList::DEFAULT ) const; + Attribute createAttribute( const H5std_string& name, const DataType& type, const DataSpace& space, const PropList& create_plist = PropList::DEFAULT ) const; + + // Given its name, opens the attribute that belongs to an object at + // this location. + Attribute openAttribute( const char* name ) const; + Attribute openAttribute( const H5std_string& name ) const; + + // Given its index, opens the attribute that belongs to an object at + // this location. + Attribute openAttribute( const unsigned int idx ) const; + + // Flushes all buffers associated with this location to disk. + void flush( H5F_scope_t scope ) const; + + // Gets the name of the file, specified by this location. + H5std_string getFileName() const; + + // Determines the number of attributes at this location. + int getNumAttrs() const; + +#ifndef H5_NO_DEPRECATED_SYMBOLS + // Retrieves the type of object that an object reference points to. + H5G_obj_t getObjType(void *ref, H5R_type_t ref_type = H5R_OBJECT) const; +#endif /* H5_NO_DEPRECATED_SYMBOLS */ + + // Retrieves the type of object that an object reference points to. + H5O_type_t getRefObjType(void *ref, H5R_type_t ref_type = H5R_OBJECT) const; + // Note: getRefObjType deprecates getObjType, but getObjType's name is + // misleading, so getRefObjType is used in the new function instead. + + // Iterate user's function over the attributes at this location. + int iterateAttrs( attr_operator_t user_op, unsigned* idx = NULL, void* op_data = NULL ); + + // Removes the named attribute from this location. + void removeAttr( const char* name ) const; + void removeAttr( const H5std_string& name ) const; + + // Renames the named attribute to a new name. + void renameAttr(const char* oldname, const char* newname) const; + void renameAttr(const H5std_string& oldname, const H5std_string& newname) const; + + // Creates a reference to a named object or to a dataset region + // in this object. + void reference(void* ref, const char* name, const DataSpace& dataspace, + H5R_type_t ref_type = H5R_DATASET_REGION) const; + void reference(void* ref, const char* name) const; + void reference(void* ref, const H5std_string& name) const; + + // Open a referenced object whose location is specified by either + // a file, an HDF5 object, or an attribute. + void dereference(H5File& h5file, const void* ref, H5R_type_t ref_type = H5R_OBJECT); + void dereference(H5Object& obj, const void* ref, H5R_type_t ref_type = H5R_OBJECT); + void dereference(Attribute& attr, const void* ref, H5R_type_t ref_type = H5R_OBJECT); + + // For subclasses. + virtual hid_t getId() const = 0; + + protected: +#ifndef DOXYGEN_SHOULD_SKIP_THIS + // Default constructor, + H5Location(); + + // Creates a copy of an existing object giving the location id. + H5Location(const hid_t loc_id); + + // Copy constructor. + H5Location(const H5Location& original); + + // Creates a reference to an HDF5 object or a dataset region. + void p_reference(void* ref, const char* name, hid_t space_id, H5R_type_t ref_type) const; + + // Dereferences a ref into an HDF5 id. + hid_t p_dereference(hid_t loc_id, const void* ref, H5R_type_t ref_type); + +#ifndef H5_NO_DEPRECATED_SYMBOLS + // Retrieves the type of object that an object reference points to. + H5G_obj_t p_get_obj_type(void *ref, H5R_type_t ref_type) const; +#endif /* H5_NO_DEPRECATED_SYMBOLS */ + + // Retrieves the type of object that an object reference points to. + H5O_type_t p_get_ref_obj_type(void *ref, H5R_type_t ref_type) const; + + // Retrieves a dataspace with the region pointed to selected. + hid_t p_get_region(void *ref, H5R_type_t ref_type) const; + + // Noop destructor. + virtual ~H5Location(); + +#endif // DOXYGEN_SHOULD_SKIP_THIS + +}; /* end class H5Location */ + +#ifndef H5_NO_NAMESPACE +} +#endif +#endif |